Recent motherboards, I believe since Intel 6 series PCH, offer a Fast Boot option in the BIOS. This skips some parts of the POST, or does it less extensive. Also, Windows 8 offers a system that stores certain loaded parts of the OS, so it will not have to be loaded again next time.

I'm not sure if thats the case, but in Windows 8 if you have fast start up enable the computer will crash on the first restart.
In windows 7 you don't have that feature, but the symptoms you describe are much alike.
You start the computer it crashes then you restart and its fine right ?
If thats what happens maybe theres some sort of fast startup/boot feature enabled on bios.

EDIT: Didn't see what was said above.
Exactly that patriekvg is talking about.

I'm not sure if thats the case, but in Windows 8 if you have fast start up enable the computer will crash on the first restart.
In windows 7 you don't have that feature, but the symptoms you describe are much alike.
You start the computer it crashes then you restart and its fine right ?
If thats what happens maybe theres some sort of fast startup/boot feature enabled on bios.

EDIT: Didn't see what was said above.
Exactly that patriekvg is talking about.

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HI~~~ NOW I TRY TURN OFF "THE FAST BOOT" IN THE BIOS, and the freeze is disappear oh thanks god~~~ my lord~~~ the fuckin problem make me crazy after make this action, i test call of duty crysis dirt tomb raide etc, there no freeze again~~~ thanks guys,you are amazing~~~

HI~~~ NOW I TRY TURN OFF "THE FAST BOOT" IN THE BIOS, and the freeze is disappear oh thanks god~~~ my lord~~~ the fuckin problem make me crazy after make this action, i test call of duty crysis dirt tomb raide etc, there no freeze again~~~ thanks guys,you are amazing~~~

Yeh, was just to see it still happened.
Uninstall HyperSLI and the nvidia drivers and do a clean install. Not sure if it will fix it but give it a try.

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hey man...i did that and i saw some improvment...running valley benchmark didn't freeze the pc as usual ..but crysis 3 still freeze the pc ...i noticed that when i lounch crysis 3 it lounch windowed ! then comes the freeze... is there any problem not running at full screen with hypersli ???

hey man...i did that and i saw some improvment...running valley benchmark didn't freeze the pc as usual ..but crysis 3 still freeze the pc ...i noticed that when i lounch crysis 3 it lounch windowed ! then comes the freeze... is there any problem not running at full screen with hypersli ???

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Yeh its fixed I guess
As for the crash, yes it crashes if you play in window mode.
Some games go into window mode before going full screen.
But just to make sure its set to full screen, go in nvidia control panel and set it up to single gpu open the game then check the settings and see if its in full screen.
If it is set to full screen nothing else can be done, as far as I know.

Yeh its fixed I guess
As for the crash, yes it crashes if you play in window mode.
Some games go into window mode before going full screen.
But just to make sure its set to full screen, go in nvidia control panel and set it up to single gpu open the game then check the settings and see if its in full screen.
If it is set to full screen nothing else can be done, as far as I know.

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it is at full screen but when the game starts it a small screen then it gets full....maybye this make it freeze?

Hello! not is if the question I have been already answered somewhere in the post but I no it and found, my question is, there the difference between REAL SLI vs HYPERSLI? I think it is a question that we have many of us, I now have the opportunity to check it, on the one hand I have to Rampage Extreme X48 and by another Striker 2 Extreme, serious test quadsli 2 gtx295 on both boards with the same processor, same RAM, same hard disk, not O.C... and make several test games with benchmark (Dirt3 Grid2, Unigine Heaven, Sleeping Dogs... and some more than you think) same resolution, same AA, same FSAA... and draw conclusions, I think that would be the most fair, since you cannot compare X48 vs X58 for example, (Dual channel vs triple channel and C2Q vs i7 I think that it is not just) that you think about the idea?
Sorry for my bad English

Is there anyone who can help me here?
Still have not made any progress. Today I will backup my stuff and do a clean software install. But I'm not sure if I should try the modified BIOS + HALmod again, or use the original BIOS + HyperSLI tool.

Is there anyone who can help me here?
Still have not made any progress. Today I will backup my stuff and do a clean software install. But I'm not sure if I should try the modified BIOS + HALmod again, or use the original BIOS + HyperSLI tool.

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HyperSLI should work for most motherboards. I don't know anything about that modified BIOS thing.
But I say you should give it a try with HyperSLI.

It's working! The modified BIOS / hall.dll method still didnt work, but HyperSLI does! Thanks to the creator of this!!
One question remaining: now everytime I start my PC, it asks which boot option I want to use. I will never need the 'normal' option again (only the HyperSLI one). Is it possible to remove the other option so it will start right away, or better: skip the question (only coming up when pressing F8). Bit offtopic, but maybe it will help someone else too using HyperSLI.

It's working! The modified BIOS / hall.dll method still didnt work, but HyperSLI does! Thanks to the creator of this!!
One question remaining: now everytime I start my PC, it asks which boot option I want to use. I will never need the 'normal' option again (only the HyperSLI one). Is it possible to remove the other option so it will start right away, or better: skip the question (only coming up when pressing F8). Bit offtopic, but maybe it will help someone else too using HyperSLI.

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yes u can ...when u choose which one to boot i think you press f8 and choose the one u want and never ask again

It's working! The modified BIOS / hall.dll method still didnt work, but HyperSLI does! Thanks to the creator of this!!
One question remaining: now everytime I start my PC, it asks which boot option I want to use. I will never need the 'normal' option again (only the HyperSLI one). Is it possible to remove the other option so it will start right away, or better: skip the question (only coming up when pressing F8). Bit offtopic, but maybe it will help someone else too using HyperSLI.

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I wouldn't recommend removing it, but you can decrease the waiting time to 3 seconds.
Open run » type in msconfig » boot tab » set the timeout to 3 seconds (lowest possible)
That should do the trick.

Hello! not is if the question I have been already answered somewhere in the post but I no it and found, my question is, there the difference between REAL SLI vs HYPERSLI? I think it is a question that we have many of us, I now have the opportunity to check it, on the one hand I have to Rampage Extreme X48 and by another Striker 2 Extreme, serious test quadsli 2 gtx295 on both boards with the same processor, same RAM, same hard disk, not O.C... and make several test games with benchmark (Dirt3 Grid2, Unigine Heaven, Sleeping Dogs... and some more than you think) same resolution, same AA, same FSAA... and draw conclusions, I think that would be the most fair, since you cannot compare X48 vs X58 for example, (Dual channel vs triple channel and C2Q vs i7 I think that it is not just) that you think about the idea?
Sorry for my bad English

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Im very interested about this ur idea is very good...time ago i was looking for a cheaper striker 2 extreme,xfx790i ultra,asus p5n64ws to compare my system but these motherboard are very rare. So when u have some result let me know so we can compare the benchmarks and games.